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149Q320 -135 320 -139Q320 -147 365 -148H390Q396 -156 396 -157T393 -175Q389 -188 383 -194H370Q339 -192 262 -192Q234 -192 211 -192T174 -192T157 -193Q143 -193 143 -185Q143 -182 145 -170Q149 -154 152 -151T172 -148Q220 -148 230 -141Q238 -136 258 -53T279 32Q279 33 272 29Q224 -10 172 -10Q117 -10 75 30T33 157ZM352 326Q329 405 277 405Q242 405 210 374T160 293Q131 214 119 129Q119 126 119 118T118 106Q118 61 136 44T179 26Q233 26 290 98L298 109L352 326Z",[514,1231,1232,1233,1236,1237,1240,1241,1137],{},"（4）热化学方程式中化学计量数可",[325,1234,1235],{},"为整数或分数","，其表示参加反应的",[325,1238,1239],{},"各物质的物质的量","，因此 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改变符号，但绝对值不变。",[514,1287,1288,1289,1292,1293,1310],{},"（6）若反应为",[325,1290,1291],{},"可逆反应","，",[332,1294,1296],{"className":1295,"jax":336},[335],[338,1297,1298],{"style":340,"xmlns":341,"width":1079,"height":1080,"role":344,"focusable":345,"viewBox":1081},[348,1299,1300],{"stroke":350,"fill":350,"stroke-width":351,"transform":352},[348,1301,1302,1306],{"dataMmlNode":355},[348,1303,1304],{"dataMmlNode":364},[366,1305],{"dataC":795,"d":796},[348,1307,1308],{"dataMmlNode":364,"transform":799},[366,1309],{"dataC":802,"d":803}," 指的是完全发生反应所吸收或者放出的热量。",[311,1312,1313],{"id":1313},"燃烧热",[514,1315,1316,1317,1334,1335,1348],{},"1.定义：",[332,1318,1320],{"className":1319,"jax":336},[335],[338,1321,1322],{"style":528,"xmlns":341,"width":551,"height":530,"role":344,"focusable":345,"viewBox":552},[348,1323,1324],{"stroke":350,"fill":350,"stroke-width":351,"transform":352},[348,1325,1326],{"dataMmlNode":355},[348,1327,1328,1330,1332],{"dataMmlNode":501},[366,1329],{"dataC":561,"d":562},[366,1331],{"dataC":565,"d":566,"transform":544},[366,1333],{"dataC":561,"d":562,"transform":569}," kPa时，",[332,1336,1338],{"className":1337,"jax":336},[335],[338,1339,1340],{"style":340,"xmlns":341,"width":876,"height":877,"role":344,"focusable":345,"viewBox":878},[348,1341,1342],{"stroke":350,"fill":350,"stroke-width":351,"transform":352},[348,1343,1344],{"dataMmlNode":355},[348,1345,1346],{"dataMmlNode":501},[366,1347],{"dataC":561,"d":562}," mol 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